CN1445812A - Colour kinescope device - Google Patents
Colour kinescope device Download PDFInfo
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- CN1445812A CN1445812A CN03107314A CN03107314A CN1445812A CN 1445812 A CN1445812 A CN 1445812A CN 03107314 A CN03107314 A CN 03107314A CN 03107314 A CN03107314 A CN 03107314A CN 1445812 A CN1445812 A CN 1445812A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
- H01J29/566—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses for correcting aberration
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
- H01J29/503—Three or more guns, the axes of which lay in a common plane
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/56—Correction of beam optics
- H01J2229/563—Aberrations by type
- H01J2229/5632—Spherical
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/56—Correction of beam optics
- H01J2229/563—Aberrations by type
- H01J2229/5635—Astigmatism
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
A color picture tube apparatus having an inline electron gun that allows technology for applying a dynamic voltage to an OLF lens to be implemented, while avoiding design difficulties. Eave-shaped electrode plates are attached, parallel with each other in a horizontal scan direction, to a field-correction electrode plate, which is a horizontally long, flatten plate in which three holes are provided, and whose shape is similar to that of an aperture in a circumferential electrode. This structure allows quadrupole lenses to be formed as auxiliary lenses having strong focusing action horizontally and divergent action vertically, and thus an HV differential can be increased. As a result, it is possible to reduce the dynamic voltage without any of the design difficulties accompanying the prior art, in which eave-shaped electrode plates are not provided.
Description
Technical field
The present invention relates to a kind of colour display tube dence, relate in particular to a kind of electrode, this electrode structure becomes to be used for a plurality of electron beams are focused on main lens on the screen.
Background technology
Usually, color picture tube has the capsule that is formed by screen panel and the funnel shaped portion that is connected panel, and thereby this picture tube demonstrates coloured image by three electron beams of the emission of the electron gun from the neck that is arranged on funnel shaped portion at phosphor screen, the screen cover that forms is to the shadow mask on the inner surface of this panel, flatly and vertically scan simultaneously, three electron beams are by level and vertical magnetic deflection field deflection, and this magnetic field is produced by the deflecting coil that is installed in the funnel shaped portion outside.
The magnetic field of the deflecting coil of use in above-mentioned colour display tube dence has the auto-convergence structure usually, so that three electron beams are focused on the screen, and the result is deformed into pincushion shape and drum respectively for this level and vertical deflection magnetic field.Like this, three electron beams that pass magnetic deflection field are subjected to disperse function in the horizontal direction, and are subjected to converging action in vertical direction.
When the track of electron beam is elongated owing to deflection angle increases, because the magnetic field of auto-convergence, so astigmatism is apparent in view, especially at the phosphor screen near surface, and because electron-beam point is from the cross-section main shaft ovalisation of more flat and along continuous straight runs that becomes, so horizontal resolution has reduced.This problem is more serious because screen panel is more flat and deflection angle increases in recent years.
Therefore, in order on phosphor screen, to obtain high-resolution image, at first must use electron gun to reduce the diameter of this electron-beam point in the horizontal direction.
The known technology that addresses this problem relates to the focusing electrode that is configured to electron gun and applies dynamic electric voltage.According to this technology, voltage increases along with the increase of deflection angle, this voltage is applied on the focusing electrode the most close and that locate in the face of a final electrode, and the result is, the main lens effect of electric field has weakened when deflection angle increases, astigmatism has been corrected, and the shape of electron-beam point has been subjected to control.
Japan Patent No.3040272 has disclosed this dynamic electric voltage The Application of Technology, wherein by shape and the orientation of adjusting through the electron beam in the hole in the electrode, and by the state of control under the voltage that electrode applies, minimizes thereby attempt that this is applied voltage.
As side effect, usually the spherical aberration in the main lens electric field of electron gun is more little, and then the electron-beam point diameter in colour display tube dence attainable reduces just big more.Is under the situation of α at given electron beam to the incident angle of main lens electric field, and the improvement spherical aberration of the maximum of main lens electric field depends on the diameter δ of electron-beam point:
δ＝(M·CsP·α
3)/2
Wherein, M is a power of a lens, and CsP is the spherical aberration coefficient.Can derive from this equation, the weakening of lensing that is produced by the main lens electric field makes spherical aberration reduce.In other words, the effective increase by the lens diameter that produced by the main lens electric field can reduce the spot diameter on phosphor screen.
Disclosed a kind of OLF (overlapping formula) lens among the Japanese patent gazette 2-18540, this is an example that realizes the technology of this idea by electrode configuration.Figure 13 shows this configuration.
As shown in figure 13, main electrode is configured to by the focusing electrode 101 of being arranged to have a spacing along the picture tube direction of principal axis therebetween and final accelerating electrode 102, and screening cover 103 is connected on the final accelerating electrode 102.
Focusing electrode 101 and final accelerating electrode 102 are formed by following two electrodes respectively, i.e. (i) tubular periphery electrode 101A and 102A, each this electrode have horizontal broad and flat tube shape and surround three electron beams; (ii) battery lead plate 101B and 102B are corrected in the field, each this battery lead plate from the edge of facing of tubular periphery electrode to retraction, and have three hole 101B1,101B2,101B3 and 102B1,102B2,102B3 respectively, this hole is open, makes electron beam vertically pass.These correct battery lead plate 101B and 102B produces three main lens electric fields corresponding to three electron beams.
By each is corrected battery lead plate 101B and 102B set for from tubular periphery electrode 101A focusing electrode 101 and final accelerating electrode 102 and 102A respectively in the face of the edge to retraction, make the high potential of final accelerating electrode 102 invade focusing electrode 101 deeply, and the final accelerating electrode 102 of the dark intrusion of the low potential of focusing electrode 101.Its result is that the main lens diameter that is produced by the main lens electric field increases effectively, and the diameter of the electron-beam point on phosphor screen can reduce.
When the dynamic electric voltage technology is applied to when being configured on the OLF formula lens electrode configuration part and when further reducing dynamic electric voltage, use to relate to the shape of regulating electron beam through-hole and orientation and control and be applied to voltage method on the electrode and come optimally that the hole of passing through of designing electron beam is difficult to satisfy all different needs.Like this, when given these design limit, the reliability variation.
Summary of the invention
The object of the present invention is to provide a kind of color picture tube with electron gun, it makes when dynamic electric voltage technology and OLF (overlapping formula) combination of lenses use, can easily reduce dynamic electric voltage.
Be arranged to realize that the color picture tube of this purpose comprises: comprise the panel of screen, this screen has the fluorophor of multiple color disposed thereon; Electron gun with negative electrode of a plurality of coaxial settings, and a plurality of tube electrodes with leave therebetween at interval mode be arranged in electron beam from this negative electrode on the path of this screen emission, each tube electrode (i) has the perforate shared with this electron beam, and a rectification battery lead plate has a plurality of electron beam through-holes, this plate is configured to from having edge in the face of this perforate of the first type surface at this interval to retraction, and (ii) produces the main lens electric field at this at interval; And the battery lead plate of a pair of outstanding edge shape, it is arranged at least one this rectification battery lead plate in this tube electrode, so that the battery lead plate of described outstanding edge shape is positioned on the either side of this electron beam through-hole along vertical scanning direction, and flatly and towards this compartment of terrain extend.
According to this structure, join in the conventional lenses structure by the battery lead plate that will give prominence to the edge shape,, used a kind of like this method to form attachment lens, promptly correct battery lead plate and the battery lead plate of outstanding edge shape is installed thereon, thereby used the method for avoiding difficult design by the field is set.This attachment lens is used to increase the level of main lens and the difference between the vertical focusing effect, and its result is to reduce dynamic electric voltage significantly.
Have at least one tube electrode that the outstanding edge shape electrode plate on the rectification battery lead plate on the scene is set herein, and comprise the final electrode that is positioned at screen side.
According to this structure, be arranged in the final electrode by the battery lead plate of the field being corrected battery lead plate and outstanding edge shape, attachment lens is formed on the screen side place in the most close electron gun, and thus, the level of main lens and vertical focusing effect can be conditioned efficiently.
Have at least one tube electrode that the outstanding edge shape electrode plate on the rectification battery lead plate on the scene is set herein, and also comprise near the focusing electrode of the final electrode in location.
This structure makes spherical aberration reduce, and the validity of two quadrupole lenss is improved.
Herein, the base portion of screening cover that is arranged on the screen side of this final electrode protrudes into this final electrode and as this rectification battery lead plate.
Because this rectification battery lead plate can be arranged in the final electrode when screening cover assembles with final electrode, so this structure is convenient to the assembling of electron gun.
Description of drawings
With reference to the accompanying drawing that specific embodiment of the present invention is shown, these and other objects of the present invention, advantage and feature can be found out from following detailed description significantly.
In the accompanying drawings:
Fig. 1 is the sectional view along horizontal scan direction, and it shows the structure of the shared color picture tube of the embodiment of the invention;
Fig. 2 is the perspective view according to the structure of the coaxial-type electron gun of embodiment 1;
Fig. 3 is the plane graph of the structure of coaxial-type electron gun shown in Figure 2.
Fig. 4 is a front view, and it shows a structure of correcting the battery lead plate of battery lead plate and outstanding edge shape;
Fig. 5 A and 5B show the model schematic diagram of the main lens structure in the coaxial-type electron gun of embodiment 1;
Fig. 6 A and 6B show the model schematic diagram of the main lens structure in the coaxial-type electron gun of prior art under the situation of the battery lead plate that outstanding edge shape is not set;
Fig. 7 shows the variation of HV poor (being the difference between level and the vertical focusing voltage) with respect to the variation of correcting the height of the outstanding outstanding edge shape electrode plate of battery lead plate from this;
Fig. 8 shows dynamic electric voltage and level point diameter variation when the HV difference changes;
Fig. 9 is a plane graph, and it shows the modification of the coaxial-type electron gun of embodiment 1;
Figure 10 is a plane graph, and it shows the structure according to the coaxial-type electron gun of the embodiment of the invention 2;
Figure 11 A and 11B show the relevant lens model of the coaxial-type electron gun of embodiment 2;
Figure 12 is a plane graph, and it shows the structure according to the coaxial-type electron gun of embodiments of the invention 3; And
Figure 13 is the plane graph of the structure of the coaxial-type electron gun (OLF lens arrangement) according to prior art.
Embodiment
Followingly describe color picture tube 1 in detail according to the embodiment of the invention with reference to accompanying drawing.
Fig. 1 is the sectional view along horizontal scan direction, and it shows the structure of color picture tube 1.
As shown in the drawing, color picture tube 1 is configured to by picture tube 10 and coaxial-type electron gun 20.Picture tube 10 comprises screen 10, and this screen has R (redness), G (green), B (blueness) fluorophor that applies by the stratiform form on the side within it, and to face shadow mask, this shadow mask has the electron beam through-hole that is formed in a large number wherein.Coaxial-type electron gun 20 inserts from the base portion of the neck 13 of picture tube 10.Three electron beam 30R, 30G, 30B corresponding to the RGB color send from coaxial-type electron gun 20, pass the magnetic deflection field by deflecting coil 15 induction, and this deflecting coil is provided with along the surface at the widened section 14 of funnel shaped portion and the interface between the neck 13.Each electron beam 30R, 30G, 30B deflect with scheduled volume subsequently in the horizontal and vertical directions, and focus in the precalculated position on the screen 12.
Describe coaxial-type electron gun 20 now in detail.
Fig. 2 is the perspective view of coaxial-type electron gun 20, and Fig. 3 is the plane graph of the internal structure of coaxial-type electron gun 20.
As shown in these figures, coaxial-type electron gun 20 is by the negative electrode 21 of being arranged to the triplets coaxial-type; The grid 22 that holds negative electrode 21; Accelerating electrode 23; Focusing electrode 24; Focusing electrode 25; Focusing electrode 26; Focusing electrode 27; Final accelerating electrode 28; And screening cover 29 forms.Voltage is formed for producing, the electric field of acceleration and focused beam, and this voltage is applied on this electrode with scheduled volume, so that produce the electrical potential difference of scheduled volume between electrode.These three electron beams are controlled their diameter dimension and track simultaneously subsequently along the predetermined direction emission.
More particularly, electron beam produces electron beam by negative electrode 21, and the energy level of electron beam (magnitude of current) is controlled by grid 22 and accelerating electrode 23.The prefocus lens electric field produces between accelerating electrode 23 and focusing electrode 24 subsequently, and electron beam injects the main lens electric field with an angle, and this angle can be regulated.Focusing electrode 24,25 and 26 is iso-electric, and it act as support and is focused in advance by the electron beam that the prefocus lens electric field carries out.
As mentioned above, in a single day focusing electrode 27 and final accelerating electrode 28 are configured to the main lens electric field, and by the main lens electric field their dispersion angle are finally regulated, just to the magnetic deflection field divergent bundle that is produced by deflecting coil.
Focusing electrode 27 and final accelerating electrode 28 are formed by following two electrodes respectively, i.e. (i) tubular periphery electrode 27A and 28A, each this electrode have that level is grown and flat tube shape and surround three electron beams; (ii) battery lead plate 27B and 28B are corrected in the field, each this battery lead plate is faced the edge to retraction from tubular periphery electrode 27A and 28A's, and have three hole 27B1,27B2,27B3 and 28B1,28B2,28B3 respectively, this hole is open, makes electron beam vertically pass.The main lens electric field that act as the generation electron gun of focusing electrode 27 and final accelerating electrode 28.
By each is corrected battery lead plate 27B and 28B set for from tubular periphery electrode 27A focusing electrode 27 and final accelerating electrode 28 and 28A respectively in the face of the edge to retraction, make the high potential (Va among Fig. 3) of final accelerating electrode 28 invade focusing electrode 27 deeply, and the low potential of focusing electrode 27 (Vfoc2 among Fig. 3) is invaded final accelerating electrode 28 deeply.In addition, compare with the situation that rectification battery lead plate in field is not set, if include this rectification battery lead plate, battery lead plate is corrected in particularly relevant with final accelerating electrode field, makes these three holes can be arranged to the edge near the periphery electrode 28A that faces focusing electrode.Like this, three electron beam through-holes have formed three lens, spacing between center lens and the side lens is greater than a situation of correcting battery lead plate is not set, (opposite, when not being provided with when correcting battery lead plate, three electron beam through-holes are only formed by the screening cover composed component, when the diameter of three lens broadens so that during more close lens centre in the periphery electrode, this spacing narrows down, and this is because should be positioned to open with the marginating compartment of the periphery electrode 28A that faces focusing electrode by the hole.) this structure makes that the distance between the shadow mask and screen reduces when the spacing between center lens and the side lens broadens, and its result is that the electron beam aberration/displacement that causes owing to earth magnetism is not easy generation.
According to said structure, electromotive force Vfoc1 is applied on focusing electrode 24 and 26, and dynamic capacity Vfoc2 is applied on the focusing electrode 27.Vfoc1 is constant, and Vfoc2 increases with the amount of deflection of electron beam.The two relation is set like this, that is, and and (zero deflection), then Vfoc1＞Vfoc2 when amount of deflection is 0.Like this, when amount of deflection increases,, make the shape of rectifiable astigmatism and controlling electron beam point by weakening the effect that the main lens electric field produces.In addition, by controlling this dynamic electric voltage, make and to reduce this dynamic electric voltage from initial state Vfoc1＞Vfoc2.This method is disclosed in Japan Patent No.3040272.
Fig. 4 shows a structure chart of correcting battery lead plate 28B.As shown in the drawing, three circular ports are provided with among the rectification battery lead plate 28B on the scene, and this is corrected the battery lead plate shape and is similar to the perforate among the periphery electrode 28A and has the long and flat shape of level.
Electrode 40 and 41 (being called " battery lead plate of outstanding edge shape ") is for giving prominence to the edge shape and being attached to conductively on this rectification battery lead plate.As shown in Figure 4, the battery lead plate 40 and 41 of outstanding edge shape is horizontally disposed with in parallel with each other, so that be arranged in along vertical scanning direction on the either side of both sides of electron beam through-hole.In addition, shown in Fig. 2 and 3, battery lead plate 40 and 41 is arranged in the face of the interval between focusing electrode 27 and the final accelerating electrode 28, and to this projection at interval.
The level of main lens and the difference of vertical focusing effect (being called " HV is poor ") can be increased by the battery lead plate that is somebody's turn to do outstanding edge shape to this interval projection being set, making, and dynamic electric voltage can be reduced thus.Herein, applying of dynamic electric voltage makes this HV difference increase and makes this lensing weaken.Can also improve the distortion of this electron-beam point or be configured to the electric field of main lens with very large sensitivity.
Herein, Fig. 6 A and 6B show the lens model that is produced by the main lens electric field under the situation of the battery lead plate 40 that outstanding edge shape is not set and 41.Fig. 6 A shows the horizontal cross-section (horizontal scan direction) of lens model, and Fig. 6 B shows the vertical cross-section (vertical scanning direction) of lens model.
As shown in these figures, this main lens has different focussing forces with vertical direction in the horizontal direction, and as mentioned above, for reducing dynamic electric voltage, it is important setting different focussing force poor (i.e. " HV is poor ").
In this lens model, 60,61 and 62 is the main lenss that produced by the main lens electric field, and they are configured to convex lens, and this convex lens along continuous straight runs has the strong-focusing effect and vertically has more weak focussing force, (strong/weak thickness by lens of lensing illustrates).For focused beam on screen, lens 63,64 and 65 are formed on the cathode side of main lens (that is, wherein the speed of electron beam is slower) independently, so that the difference of the lensing that compensation along continuous straight runs and vertical direction produce.These lens are quadrupole lenss, and quadrupole lens is configured to the convex lens that along continuous straight runs has the concavees lens of strong disperse function and vertically has the strong-focusing effect.
Fig. 5 A and 5B show and are provided with the lens model that is produced by the main lens electric field according under the situation of the battery lead plate 40 of the outstanding edge shape of the embodiment of the invention and 41.Fig. 6 A shows the horizontal cross-section (horizontal scan direction) of lens model, and Fig. 6 B shows the vertical cross-section (vertical scanning direction) of lens model.
As shown in these figures, added attachment lens, and these attachment lenses are considered to as main lens by the battery lead plate generation of outstanding edge shape.
More particularly, in this lens model, 50,51 and 52 have formed the one group of main lens that is produced by the main lens electric field, and they are configured to convex lens, and this convex lens along continuous straight runs has the strong-focusing effect and vertically has focussing force.In addition, except lens 50,51 and 52, attachment lens 53,54 and 55 is formed by the battery lead plate of the outstanding edge shape that comprises.These lens are quadrupole lenss, and this quadrupole lens is configured to the concavees lens that along continuous straight runs has the convex lens of strong-focusing effect and vertically has disperse function.Subsequently, for focused beam on screen, quadrupole lens 56,57 and 58 is configured to the convex lens that along continuous straight runs has the concavees lens of strong disperse function and vertically has the strong-focusing effect, this quadrupole lens is formed on the cathode side of main lens independently, so that the difference of the lensing that compensation along continuous straight runs and vertical direction produce.
Can find out clearly that more than when the battery lead plate of the outstanding edge shape of attachment lens by the embodiment of the invention is set adds fashionablely, the HV difference can increase.Its result is, compared with prior art (battery lead plate of outstanding edge shape is not set), can reduce this dynamic electric voltage.
Provide one herein, and related to the concrete example that increases the HV difference by the battery lead plate that outstanding edge shape is set on the rectification battery lead plate on the scene.Fig. 7 shows the variation of the variation of HV difference with respect to the height of the outstanding edge shape electrode plate of giving prominence to from this rectification battery lead plate.When the height of the battery lead plate of giving prominence to the edge shape is 0.0 (,, be provided with a rectification battery lead plate, but do not give prominence to the battery lead plate of edge shape as prior art), the HV difference is 4000V.As a comparison, after being attached this rectification battery lead plate, the HV difference increases with the increase of the height of outstanding edge shape electrode plate.
Fig. 8 shows dynamic electric voltage and level point diameter variation when the HV difference changes, and can reduce the compression dynamics by increasing the HV difference thus, can predict the simplification of circuit and the saving of cost.Yet, change the HV difference and also changed the level point diameter, and because the HV difference when raising the level point diameter after arriving minimum value, increase again, so this HV difference is preferably the vicinity that is set in level point diameter arrival minimum value.Relevant with electron gun of the present invention, when the HV difference is near 3000V, level point diameter minimum.
Therefore, in embodiments of the present invention, the height setting of the battery lead plate of outstanding edge shape is about 0.5mm, to obtain the HV difference (see figure 7) of 3000V.By this way, dynamic electric voltage and level point diameter all can be set the value littler than prior art for.Herein for the purpose of reference, the measured value of other parts is being included in wherein: each tube electrode has the battery lead plate setting field thereon of outstanding edge shape and corrects battery lead plate, this tube electrode is 7.0mm along the length of tube axis direction, the length of correcting battery lead plate of showing up from the screen side edge of each tube electrode is 4.6mm, and each corrects the thickness that battery lead plate has 0.7mm.
, be arranged in the face of the interval between focusing electrode 27 and final accelerating electrode 28 and towards this interval projection herein, thereby make the lensing maximization by the battery lead plate 40 and 41 that will give prominence to the edge shape.In other words, the end of the battery lead plate by will giving prominence to the edge shape is arranged on the position near potential gradient this interval jumpy, and feasible sensitivity with respect to this lens electric field has raise.But, if this end is positioned to too close this interval, disadvantageous effect may appear, for example because thin plate makes that near low-pressure side region generating is discharged nearby, and owing to this reason, this end need be positioned to not produce discharge.Herein, the battery lead plate of outstanding edge shape is high more, and this end-to-end distance is sowed discord every near more, so the degree of the attenuating of dynamic electric voltage is just big more.Yet, as the present invention, correct on the battery lead plate by the field that the battery lead plate that will give prominence to the edge shape is set in place in barrel portion, make under the situation of the height of the battery lead plate that increases outstanding edge shape, this end can be arranged to unessentially nearer apart from this interval.Like this, the battery lead plate of outstanding edge shape can be attached with high accuracy, and the result is, this structure also makes can avoid the dispersion interaction that caused by the chromatic dispersion in the opening between the end.
In addition, because in the quadrupole lens 53,54 of screen side and 55 and in the quadrupole lens 56,57 of cathode side and two quadrupole effects of 58, the magnification ratio and the increase magnification ratio vertically of lens along continuous straight runs can be reduced, astigmatism and the further distortion that suppresses along the lateral electron-beam point can be further corrected like this.
Herein, electron gun also can be constructed in the following manner.Fig. 9 is a plane graph, and it shows the modification of coaxial-type electron gun.
As shown in the drawing, in this modification, the coaxial-type electron gun is included in the target 70 between focusing electrode 27 and the final accelerating electrode 28.Herein, voltage Vm2 is applied on the target 70 by resistance R 1.Except above-mentioned effect/effect, according to this structure, can also increase the diameter of lens effectively, this is because the lens electric field has been expanded along tube axis direction.Relevant structure, effect and similarity piece at length are disclosed in Japanese unexamined patent application publication 8-22780.
Embodiment 2
Embodiment of the present invention will be described 2.
Figure 10 is a plane graph, and it shows the structure according to the coaxial-type electron gun of present embodiment, and Figure 11 A shows relevant lens model with 11B.
Difference from Example 1 is that the battery lead plate 60 and 61 of outstanding edge shape is provided with on the rectification battery lead plate 27B on the scene, and the battery lead plate 60 of this outstanding edge shape and 61 is in the face of the interval between focusing electrode 27 and final accelerating electrode 28 and towards this projection at interval.
According to this structure, shown in Figure 11 A and 11B, except the lens shown in Fig. 5, produced quadrupole lens 66,67 and 68, these lens have the disperse function bigger than main lens (concavees lens) and vertically have the focussing force bigger than main lens (convex lens) at the low-pressure side along continuous straight runs.
Weaken because these lens make horizontal focusing act in the area of low pressure, this zone is the zone that is subjected to the spherical aberration appreciable impact in the main lens, so can reduce influences the horizontal ball of electron-beam point surface aberration most.
In addition, determine by the electrical potential difference between electrode 27 and 28 at the quadrupole lens 56,57 of cathode side and 58 action intensity, and because when attempt to strengthen this lensing, can occur discharging and other problem, so have a restriction for this electromotive force extent, like this, to also having a restriction at the quadrupole lens 56,57 of cathode side and 58 action intensity.Yet,,, strengthened two quadrupole effects thus under the situation that does not apply above-mentioned qualification so the HV difference has increased because strengthened quadrupole lens 56,57 and 58 at cathode side at the quadrupole lens 66,67 and 68 of the low-pressure side of main lens.
Embodiment 3
Embodiment of the present invention will be described 3.
Figure 12 is a plane graph, and it shows the structure according to the coaxial-type electron gun of embodiments of the invention 3.
In the coaxial-type electron gun of present embodiment, protuberance 29A is formed on the screening cover of electron gun of embodiment 1, so that protrude into final accelerating electrode, and the base portion 29B of protuberance 29A corrects battery lead plate as the field.As mentioned above, the battery lead plate 40 and 41 of outstanding edge shape is arranged on this base portion 29B.
Except above-mentioned effect/effect,, when screening cover cooperates with final accelerating electrode, the field can be corrected battery lead plate and be arranged in the final accelerating electrode, and be convenient to the assembling of electron gun thus according to this structure.
Herein, though embodiment 2,3 implements independently, they can make up enforcement.Can obtain effect of Combination like this.
In addition, as mentioned above, although the present invention is effective especially for the technology that applies dynamic electric voltage, it also can be used as HV difference adjusting device and uses, even is not applied in and applies in the electron gun of dynamic electric voltage to electrode.
According to aforesaid colour display tube dence of the present invention, used a kind of method of avoiding the difficult design relevant with the battery lead plate that outstanding edge shape is set, by adding the battery lead plate of outstanding edge shape, so that form the attachment lens except the main lens of routine, and the level of main lens and vertical focusing effect difference increase therefrom, and therefore further reduce dynamic electric voltage.
Although the present invention describes in detail in conjunction with the embodiments with reference to accompanying drawing, should be appreciated that for those of ordinary skill in the art different change and modification be tangible.Therefore, unless these change and modification has broken away from scope of the present invention, these change and modification should be understood that to be included in this
In the invention scope.
Claims (4)
1. colour display tube dence, it comprises:
The panel that comprises screen, this screen has the fluorophor of multiple color disposed thereon;
Electron gun with negative electrode of a plurality of coaxial settings, and a plurality of tube electrodes with leave therebetween at interval mode be arranged in electron beam from this negative electrode on the path of this screen emission, each tube electrode (i) has the perforate shared with this electron beam, and a rectification battery lead plate has a plurality of electron beam through-holes, this plate is configured to from having edge in the face of this perforate of the first type surface at this interval to retraction, and (ii) produces the main lens electric field at this at interval; And
The battery lead plate of a pair of outstanding edge shape, it is arranged at least one this rectification battery lead plate in this tube electrode, so that the battery lead plate of described outstanding edge shape is positioned on the either side of this electron beam through-hole along vertical scanning direction, and flatly and towards this compartment of terrain extend.
2. colour display tube dence according to claim 1 is characterized in that described at least one tube electrode has the battery lead plate that is arranged on the outstanding edge shape on this rectification battery lead plate, and this at least one tube electrode comprises the final electrode that is positioned at screen side.
3. as colour display tube dence as described in the claim 2, it is characterized in that, described at least one tube electrode has the battery lead plate that is arranged on the outstanding edge shape on this rectification battery lead plate, and this at least one tube electrode comprises near the focusing electrode that is positioned at this final electrode.
4. as colour display tube dence as described in claim 2 or 3, it is characterized in that the base portion of screening cover that is arranged on the screen side of this final electrode protrudes into this final electrode and corrects battery lead plate as described.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP77853/2002 | 2002-03-20 | ||
| JP77853/02 | 2002-03-20 | ||
| JP2002077853 | 2002-03-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1445812A true CN1445812A (en) | 2003-10-01 |
| CN1276461C CN1276461C (en) | 2006-09-20 |
Family
ID=27800376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB03107314XA Expired - Fee Related CN1276461C (en) | 2002-03-20 | 2003-03-20 | Colour kinescope device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6965192B2 (en) |
| EP (1) | EP1349193B1 (en) |
| KR (1) | KR20030076392A (en) |
| CN (1) | CN1276461C (en) |
| DE (1) | DE60309529T2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320591C (en) * | 2004-05-19 | 2007-06-06 | 松下东芝映象显示株式会社 | Color cathode ray tube apparatus |
| CN1324638C (en) * | 2004-05-10 | 2007-07-04 | 松下东芝映象显示株式会社 | Cathode ray tube |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4581560A (en) | 1981-12-16 | 1986-04-08 | Hitachi, Ltd. | Electron gun for color picture tube |
| JPS63245846A (en) * | 1987-04-01 | 1988-10-12 | Hitachi Ltd | Electron gun for color picture tube |
| JPH0218540A (en) | 1988-07-06 | 1990-01-22 | Matsushita Electric Ind Co Ltd | Transmissive back screen |
| JPH0265037A (en) * | 1988-08-31 | 1990-03-05 | Hitachi Ltd | Electron gun for color television picture tube |
| JP3040272B2 (en) | 1992-12-16 | 2000-05-15 | 松下電子工業株式会社 | Color picture tube equipment |
| JPH0721936A (en) | 1993-06-30 | 1995-01-24 | Hitachi Ltd | Cathode-ray tube |
| JP3324282B2 (en) | 1994-07-11 | 2002-09-17 | 松下電器産業株式会社 | Color picture tube equipment |
| KR960019452A (en) * | 1994-11-04 | 1996-06-17 | 이헌조 | Electron gun for color cathode ray tube |
| KR100399510B1 (en) | 1995-10-18 | 2004-03-20 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Display system |
| US6400105B2 (en) | 1997-09-05 | 2002-06-04 | Hitachi, Ltd. | Color cathode-ray tube having electrostatic quadrupole lens exhibiting different intensities for electron beams |
| JPH11135033A (en) * | 1997-11-04 | 1999-05-21 | Matsushita Electron Corp | Color picture tube |
| JP2000067774A (en) * | 1998-08-25 | 2000-03-03 | Mitsubishi Electric Corp | In-line type electron gun |
| US6570314B2 (en) | 2000-04-14 | 2003-05-27 | Matsushita Electric Industrial Co., Ltd. | Color display tube |
| JP3818074B2 (en) | 2000-04-14 | 2006-09-06 | 松下電器産業株式会社 | Color picture tube |
-
2003
- 2003-03-14 US US10/389,125 patent/US6965192B2/en not_active Expired - Fee Related
- 2003-03-19 EP EP03251720A patent/EP1349193B1/en not_active Expired - Fee Related
- 2003-03-19 DE DE60309529T patent/DE60309529T2/en not_active Expired - Fee Related
- 2003-03-20 KR KR10-2003-0017321A patent/KR20030076392A/en active IP Right Grant
- 2003-03-20 CN CNB03107314XA patent/CN1276461C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324638C (en) * | 2004-05-10 | 2007-07-04 | 松下东芝映象显示株式会社 | Cathode ray tube |
| CN1320591C (en) * | 2004-05-19 | 2007-06-06 | 松下东芝映象显示株式会社 | Color cathode ray tube apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1276461C (en) | 2006-09-20 |
| DE60309529T2 (en) | 2007-05-03 |
| US6965192B2 (en) | 2005-11-15 |
| DE60309529D1 (en) | 2006-12-21 |
| EP1349193A2 (en) | 2003-10-01 |
| EP1349193B1 (en) | 2006-11-08 |
| US20030178930A1 (en) | 2003-09-25 |
| KR20030076392A (en) | 2003-09-26 |
| EP1349193A3 (en) | 2004-08-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060920 Termination date: 20100320 |